The StorageWorks Enclosure Model 2200 is the new packaging for the HSG80 RAID controller. The Model 2200 provides the connection between the HSG80 and disks installed in Compaq StorageWorks Model 4200 drive enclosures. The Model 2200 supports one or two HSG80s. Two cooperating controllers provide redundancy for high availability. Six channel connections on the Model 2200 allow for connection for six single-bus drive shelves or 3 dual-bus drive shelves.